Here is a small car that is uses the atmospheric pressure as a medium for storing potential energy as a power source. It follows the initial project of using a larger water squirter toy on a car of similar design. In this case, a small syringe is stoppered at the tip and when the plunger is pulled out, the differential between the inside of the syringe and the atmosphere outside of it can be used to supply the turning force on the rear axle. A string wrapped around the rear axle supplies the torque giving car distance close to 100 feet. A second method of using a pulley system to increase the power supply range but reducing the torque is introduced but appears to need some additional modifications ( still a work in progress).